Optical disk, optical disk device, and method of reproducing information on optical disk

(19)

(11)

EP 1 229 523 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	22.09.2010 Bulletin 2010/38

(43)	Date of publication A2:
	07.08.2002 Bulletin 2002/32

(21)	Application number: 02007349.0

(22)	Date of filing: 07.02.1997

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International Patent Classification (IPC):

G11B 7/00^(2006.01)
G11B 20/12^(2006.01)

G11B 7/007^(2006.01)
G11B 20/14^(2006.01)

(84)	Designated Contracting States:
	DE FR GB

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Priority:

08.02.1996 JP 2227396

(62)	Application number of the earlier application in accordance with Art. 76 EPC:
	00105753.8 / 1022739
	97902635.8 / 0880129

(71)	Applicant: Panasonic Corporation
	Kadoma-shi Osaka 571-8501 (JP)

(72)	Inventors:
	Ishida, Takashi Yawata-shi, Kyoto 614 (JP) Gushima, Toyoji Habikino-shi, Osaka 583 (JP)

(74)	Representative: Balsters, Robert et al
	Novagraaf International S.A. Avenue du Pailly 25 1220 Les Avanchets-Genève 1220 Les Avanchets-Genève (CH)

(54)	Optical disk, optical disk device, and method of reproducing information on optical disk

(57) The present invention is aimed at providing an optical disk comprising a plurality of tracks each divided into a plurality of recording sectors, wherein each of the plurality of recording sectors includes a data recording region and a postamble region which is provided following the data recording region. Information indicating a next state, to which a state which has been used to modulate a last one of the plurality of data is to transition, is recorded in the postamble region. The recording sector further includes a guard data recording region following the postamble region for recording dummy data.

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